##### http://autoconf-archive.cryp.to/ax_gcc_install_dir.html
#
# SYNOPSIS
#
#   AX_GCC_INSTALL_DIR (VARIABLE)
#
# DESCRIPTION
#
#   AX_GCC_INSTALL_DIR (VARIABLE) defines VARIABLE as the gcc install
#   directory. The install directory will be obtained using the gcc
#   -print-search-dirs option. This macro requires AX_GCC_OPTION macro.
#
# LAST MODIFICATION
#
#   2005-01-22
#
# COPYLEFT
#
#   Copyright (c) 2005 Francesco Salvestrini <salvestrini@users.sourceforge.net>
#
#   This program is free software; you can redistribute it and/or
#   modify it under the terms of the GNU General Public License as
#   published by the Free Software Foundation; either version 2 of the
#   License, or (at your option) any later version.
#
#   This program is distributed in the hope that it will be useful, but
#   WITHOUT ANY WARRANTY; without even the implied warranty of
#   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
#   General Public License for more details.
#
#   You should have received a copy of the GNU General Public License
#   along with this program; if not, write to the Free Software
#   Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
#   02111-1307, USA.
#
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AC_DEFUN([AX_GCC_INSTALL_DIR], [
AC_REQUIRE([AC_PROG_CC])
if test "x$GCC" = "xyes"; then
	AX_GCC_OPTION(GCC_ALL_DIRECTORIES,[-print-search-dirs],[yes],[no])
	if test x"$GCC_ALL_DIRECTORIES" = x"yes"; then
		AC_MSG_CHECKING([gcc install directory])
		ax_gcc_install_dir=`$CC -print-search-dirs | grep install | sed -e "s/^install://" | sed -e "s/\/$//"`
		AC_MSG_RESULT([$ax_gcc_install_dir])
		$1=$ax_gcc_install_dir
	else
		unset $1
	fi
else
        AC_MSG_RESULT([sorry, no gcc available])
	unset $1
fi
])
